The Effect of History on Hydrogen Assisted Cracking: 1. Coupling of hydrogenation and crack growth

摘要: This paper analyzes the effect of process history on K-dominance condition in hydrogen assisted cracking. The performed study stress-strain diffusion reveals that hydrogenation fracture zone is not a purely K-driven local autonomous phenomenon. Hydrogenation and crack growth are shown to be coupled processes, one influencing other. Consequently, particular histories stress intensity factor K size evolutions affect rate ν can occur at same instantaneous K-value given material. Thus kinetics curve ν=ν(K) unique as an intrinsic material property must be.